Electric alarm-clock



(No Model.)

C. P. WYMAN. ELECTRIC ALARM GLOUK.

No. 507,959. Patented OGL-31,1898.

l f77/vena? /arlesl? Wyman UNITED STATES PATENT EETCE.

CHARLES F. WYMAN, OF MINNEAPOLIS, ASSIGNOR TO LAWRENCE E. GERETY ANDHENRY W. KNAPP, OF ST. PAUL, MINNESOTA.

ELECTRIC ALARM-CLOCK.

SPECIFICATION forming part of Letters Patent No. 507,959, dated October31, 1893.

Application filed November 29, 1892. Serial No. 453,521. (No model.)

To a/ZZ whom it may concern: glass front 9 and the frame of the clock'Iin- Be it known thatI, CHARLES F. WYMAN, of terpose the metal ringhaving the inwardly the city of Minneapolis, county of Hennepin,projecting flange 11. This flange is provided State of Minnesota, haveinvented certain Imwith an annular groove 12. The sliding con- 55 5provements in Electric Alarm Attachments tact is composed of abifurcated block 13 for Clocks, of which the following isa specifitoembrace the flange or ring 11 and is se- Catioll. cured thereon by theshort screw 14 project` My invention relates to means yadapted for inginto the groove 12. The block is prevented employment with clocks of theordinary confrom slipping upon the ring by a spring 15 6o ro struction,and by the use of which an electric arranged in the boss 16 on the innerside of bell or bells may be operated at predeterthe block, the holebeing a continuation of mined times for which the instrument is set. thescrew hole in the outer side. In place of The object of the invention isto provide this spring I may substitute the iiat bow a device of cheapand simple construction spring 17 secured to the under side of the 65 15adapted for attachment to any clock and problockraud pressing on thering, but I prefer vided with an adjustable contact or contacts thecoiled spring 15 as the same occupies less whereby the use of a largenumber of staspace, and the two contact points may be tionary contactsis dispensed with, thereby moved so close together as to form contactsagreatly reducingthe cost of manufacture and, quarter of an hour apart.In place of the 7o 2o in consequence, the selling price. screw 14 andthe groove on the outside of the To this end my invention consists inthe ring, I may provide a similar groove 17 on combination withametalring,arranged about the inner side and of a width to accommothe clockface, of a slidable contact block or date the ends of the flat spring17, which enblocks provided on said ring and havingapin tering the samewill prevent the pulling 0E 75 or pins to be engaged by the hour-hand,the the block. In the hole 18 of the block I probell being included in acircuit the terminals vide the spindle or pin 19 normally supported ofwhich are respectively the post of the clock by the light coiled spring20. The inner end and said ring. of this pin is preferably upset, asshown, to

The invention further consists in details of prevent its pulling out ofthe block. The pin 8o 3o construction and in combinations all as hereisprovided with a V groove 21 and when inafter described and particularlypointed out pressed down the pin is held in place by the in the claims,and will be more readily underspring catch 22 entering this groove andcomstood by reference to the accompanying drawposed of a small headedpin 23 pressed inings, in which wardly by the coiled spring 24, arrangedin 85 Figure 1 shows the face of a clock provided the stud 25 formingthe inner end of the with an alarm attachment embodying my inblock. Whenthe spindle 19 is thus pressed vention. Fig. 2 is a cross sectionthereof on down it is in position to be engaged by the the line xofFig. 1. Fig. 3 is an enlarged linger 6 upon the hour hand, when the hoursectional detail of the contact block. Fig. 4 hand has advanced to apoint on the dial op- 9o 4o shows a section of the ring with modifiedposit-e the pin. Y

means for securing the block thereon. Figs. I preferably provide fromtwo to six of the 5 and 6 are detail views of a modified block. smallblocks for each clock and, if desired, a As shown in the drawings, 2represents the number of small switches or loop cords 27 frame of theclock and 3 the dial thereof. The may be provided in connection with theline 95 hour andvminute hands, 4and 5 respectively, 28 extending fromthe middle ring.

are of the usual form with the exception that A grounded line, includingbattery, is conthe hour hand is providedwith the contact nected with thepost of the clock or with the finger 6 secured in a coil 7 upon the endof frame thereof. The separate bell circuits 29 the hour hand. Thecontact finger or wire are connected to the switches 27 and the bells mo5o is so coiled to prevent straining of the hour being arranged inseveral rooms of a house, hand. Between the usual rim 8 carrying the oneor more of the same may be rung at the same time. If it is desired tocall different persons at dierent times I provide acommon `switch boardand loop cords to be connected to the sliding blocks.

To aid in the proper adjustment of the contact blocks I sometimes markthe surface of 1 side to receive this shoulder 30 and'isprovided withthe hole 3l to receive the spring spindle or pin 32, which spindle hasfalug S3 projecting into the slot 34 which extends into the hole 3l.

the block to let the pin down. For preventing the slipping of the blockupon the ring I provide the looped spring 37, thecoifled ends of whichare secured on the under side of the block.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of aclock,and thedial and handsthereof, of a metal ring arranged about said dial, a slidable` contactblocker blocks arranged upon said ring and each provided With anadjustable contact pin or spindie, said ring and thehour hand forming`the terminals of an alarmcircuit, substantially as described.

2. The combination of a clock. andr the dial and hands thereof, of ametal ring arranged upon the clock in proximityI to the dial thereof Thepin is providedr with a milled head 35 and when the pin is torced downthe v head is turned so as to carry the lug out of i the lineof the pinand beneath the'bottorn of and concentric with the same, an annulargroove provided in saidring; a slidable block arranged thereon andprovided with the p rojection extending into said groove, a spring forholding the block in place upon the ring,

anadjustable-contact pin provided on said block, and an alarm circuithaving for its terminals said ring and the hour hand, substantially asdescribed.

3. Thelcombination with the clock frame, of the dial and the hands ofthe clock, with the metal ring arranged upon said frame concentric withsaid dial, saidv ring provided with the groove, a biturcated movableblock arranged on the ring and having a projection extending into saidgroove, a pressure spring arranged on theblock toengage the ring, thespindle `19, the coiled spring V2O thereon, said spindle provided withthe groove 21 and a batteryci-rcu-it or circuits of which the hour .handandlsaid ring form the terminals, substanti ally as described.

4. The combination of a clock frame, with the dial and the handsthereof, theanged ring 10, said ring provided with an annular groove, a.bifurcated block provided with a pressure spring anda projectionextending into the groove,- the spindle 19 arranged in the block, thecoiled spring 20, said spindle provided with the groeve 21,.tlre stud 25on the block, and the pointed spring latch" 22 toengage ythe spindle 19andhol'd the same against the spring 2.0, andan electric circuit ofwhich the hour hand and said riiig form` the terminals, substantiallyasl described: p

In testimony wherenf'll have hereunto7 set my hand this 19th. day ofNovember; 1892.

CHARLES? F. WYMAN.

In: presence of-f G'. G. HAWLEY,

S. LYON.

